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2025-09-10 - 08:15
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 20 highest latencies:
System rackdslot1.osadl.org (updated Wed Sep 10, 2025 00:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
461321790,6sleep1968499cyclictest23:35:141
2847191660,3ptp4l0-21swapper/119:40:261
2847191630,29ptp4l9-21ksoftirqd/019:10:100
2847191600,3ptp4l0-21swapper/121:20:161
2847191590,2ptp4l0-21swapper/021:00:290
2847191580,4ptp4l0-21swapper/119:49:551
2847191580,4ptp4l0-21swapper/119:49:551
2847191580,4ptp4l0-21swapper/019:35:180
2847191580,3ptp4l0-21swapper/023:15:290
2847191580,3ptp4l0-21swapper/020:01:240
2847191580,3ptp4l0-21swapper/019:50:240
2847191570,5ptp4l0-21swapper/319:05:013
2847191570,3ptp4l0-21swapper/120:05:331
2847191570,3ptp4l0-21swapper/023:52:110
2847191570,2ptp4l0-21swapper/021:10:280
968699567,12cyclictest4743-21chrt20:06:353
2847191560,5ptp4l0-21swapper/020:33:090
2847191560,4ptp4l0-21swapper/119:15:271
2847191560,4ptp4l0-21swapper/022:11:530
2847191560,3ptp4l0-21swapper/219:36:502
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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